Zircon U-Pb Geochronology Constrains Continental Expression of Great Meteor Hotspot Magmatism
AffiliationDepartment of Geosciences, University of Arizona
Eastern North American Margin
Great Meteor Hotspot
zircon U-Pb geochronolgy
MetadataShow full item record
PublisherBlackwell Publishing Ltd
CitationKinney, S. T., MacLennan, S. A., Keller, C. B., Schoene, B., Setera, J. B., VanTongeren, J. A., & Olsen, P. E. (2021). Zircon U-Pb Geochronology Constrains Continental Expression of Great Meteor Hotspot Magmatism. Geophysical Research Letters, 48(11).
JournalGeophysical Research Letters
RightsCopyright © 2021 American Geophysical Union. All Rights Reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractThe New England-Québec Igneous Province is considered to be a continental expression of Great Meteor Hotspot magmatism, though other geodynamic scenarios have been suggested. Existing geochronologic data lack the needed accuracy and precision to permit tests of potential causal mechanisms. We provide zircon U-Pb ages for four igneous centers and a suite of plate reconstructions and show that the duration between magmatism in each branch of this province is ca. 3–6 Myr shorter and ca. 10 Myr older than predicted if the spatial-temporal distribution of magmatism conformed to a well-defined age progression. However, in addition to uncertainties in plate reconstructions, variable regional crustal thickness or lithospheric topography likely played a role in mediating the rates of melt transport to emplacement depth and we therefore cannot reject the hotspot hypothesis. Our results place the best-available chronological constraints on continental magmatism associated with one of the oldest and longest-lived hotspots. © 2021. American Geophysical Union. All Rights Reserved.
Note6 month embargo; published online: 05 June 2021
VersionFinal published version